Apple iPad 2 has in built Bluetooth and by default this would be disabled. You can enable or turn on Bluetooth in iPad 2 using the General Settings.
From the home screen, select Settings option.
In the General Settings screen, navigate to Bluetooth settings.
to enable or turn on the Bluetooth in iPad 2, touch the empty label that appears before the OFF.
Now your iPad 2 will start discovering the list of available Bluetooth devices for pairing as shown below